Excavator front-end construction



sfR. w. M. BAGr-:R ET AL EXCAVATOR FRONT END CONSTRUCTION May 8, 1923.

Filed Mrch 1e, 1922 Eval-it R I .W.M-EBQET Wqrnarylehmen Patented May S, 1923.

UNHTEO STAT y instan ,SVANTE Pv. W. M. BAGER, WERNER LEHMAN, AND'FREDERICK C. RUHLOFF, OF y SOUTH MILWAUKEE, WISCONSIN, ASSIGNORS TO BUCYRUS COMPANY, F SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

vEXCAVATOR FRONT-ENI) CONSTRUCTION.

Application filed March 16,` 1922. Serial No.` 544,323.

To au whom it may concern:

Be it known that we, SVANTE'R. W. M. BAGER, W'ERNER LEHMAN, and FREDERICK C. RUHLOFF, all citizens of the United States, and residents of South Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Excavator Front-End Constructions; and we do hereby declare that the following is a full, clear,`

act description thereof.

This invent-ion relates to certain new and useful improvements in excavators and refers more particularly to a front end construction for a railway7 type shovel.

' Considerable ditiiculty j has been experienced in the past in providing a car front end 'construction having substantially beveled corners, in order to permit the dipper to swing back close to the car when digging at an angle, and at the same time have suficient strength to support the boom structure and withstand the blows of the dipper door or hinges incidental to the operator trying to get the dipperback as far as possible to start a cut or get in back of a boulder which may have rolled down close tothe front end. f

Hence, this invention has for a primary object to provide a carfront end of the desired shape-which is so designed and constructed as to properly support the weight of the boom structure and withstand the blows fromthe dipper. 1

Another object of this invention is to provide a transom structure for binding together the car body sills which structure includes inner and outer castings, the outer castings having their outer faces at an angle with respect to the car front end to form the desired beveled corners.

It is a further object of this invention to provide a reinforced front end construction having beveled corners in which the nner I-beam. sillsare preferably reinforced by web 'stifening platesextending to a point considerably inwardly oftheir outer ends. l i still furtherobject of this invention yis topijovidev renewable buffer blocks for 50 the transom structure castings, which blocks protect the carlbody front yend fromdamage by the 'swinging of the ldipper too close to the car-front end. i, i.

With the above and 'other objects in view and exwhich will appear as the description `proceeds, our invention resides in the `novel construction, combination and arrangement f of parts substantially as hereinafter described and more particularly defined by the appended claims, vit, being understood that such changes in the precise embodiment of y the herein disclosed invention maybe made as come within the scope `of the claims.'

In the accompanying drawing, we have illustrated one `complete .example of the l physical embodiment of our invention constructed according to the ybest mode we have so far devised for the practical application of the principles thereof, and in t which: y

Figure 1 is a top view of the front endy ofwa railway type shovel 'constructed in accordance with our invention, the boom str uc` ture 'being removed and parts broken away and in section; i

Figure 2 is a fragmentary view, partly vin section and partly in elevation, of the front buffer end, said 'view being taken on the plane of line 2 2 of Figure 1 ;y

Figure 3 is a fragmentary sectional view taken through one of the separator cast. ings` on the line 3-3 of Figure 1;`

Figure i is an enlarged fragmentary sec-V tional view taken through vFigure 2 on the plane of the line M, and

Figure 5 is a fragmentary sectional view taken through Figure 1 on the .plane of line 5 5. i

In railwayv type shovels, it is highly cle-- i sirable that the'frontends have its corners beveled to permit the Clipper to swing 'back close to the car when digging at an angle, and diiiicultyhas been experienced in sodesigning the Vcar body front end and ,at the same time provide'suficient strength to sup- -9 port the boom structure and withstand the frequent blows imparted thereto by the Idippei'Y door or hinges .incidental to the operator `endeavoring to positionfthel clipper back as farl as possible to start a cut, lor get in backV of a boulder which may have rolled down close ytothe front end-lt wasformeily cusn y tomary to obtain y,this construction by vextending the inner-I- beam or sills -beyond theeouter sills orfI-beams 6, the beveled. cor.-

nersnth'en being formed either. by bending. suitable outer structural members, (such: as

I-beams or channels, or more frequently by riveting a bent plate extending around the corner.

This construction did not enable the outer sills 6 to reinforce'the inner sills 5 and assist them in supporting the heavy weight of the boom (not/shown) swivelledion asupport 7 mounted on amain base plate 8 at the.

car body front end. Hence, the inner I- beains frequently broke7 and` other structures devised to provide ther required strength sacrificed the advantages of the beveled corners, which isiinpvortant to permit the dipper to swing backl close to the car when digging at anY an,f ;'le. In the accoinpanying drawing., the advantages of the beveledcorners are obtained together with the requisite st rengthvto supportthe booni structure rand prevent ydamage to the car end by thedipper,

As clearly illustrated in-Eigure 1, the forward ends of sills 5- extend beyond the adjacent ends of sills 6 and thecinner ande outersil'ls are bound together by a 'transom structure, including separator castings 9, the outer ends of which, are inclined forwardly and-i11wardly to provide the desired bevel to the car corners. Each separator casting;

has a rearwardly projecting tubular part` 10 whichl 'is positioned between.k the adjacent inner and, outer sills and extends preferably to a point adjacentthe inner end of baseA plate 8, and the tubular part is reinforced by a transverse web 10. Castings 9 are secured in posit-ion by vertical bolts 11 which pass through base plate 8 and the separator castings and transverse bolts 12 which pass through. the adjacent inner and outer sills and the castings. To provide additional strength and bring the top faces of. the separatorcastings 9 flush' with the top faces or' the Lbeams Sand 6 to forni an unbroken. surface for receiving the base plate 8, the longitudinal -corners of each casting are channeled, as at 9', so that their sides each have a snug tit in the channel of the adjacent I- beam and theirl top facesareon. aplanelevel with the upper faces of the I-beams.

The space between the forward ends oty the inner sills isenclosed by a front buffer or bridge casting 13, the ends of which are formed withy inwardly projecting anges 14 for securement to the webs of the inner sill by bolts 15t Bolts 15 also serve to anchor the forward endsof the separator castings and .secure a stid'enerplate 16 to the inner Webfacel ofeachllsilli, The stitlener plates 16 entend rearwardly ofthe base plate innei` end'and are also, secured 'to'sills 5 byl the bolts212.

` A4 rearwardly projecting bottom flange 17 i isforined on, casting,13,`the ends of which overlap Cafe th ing n the4 separator castings and are sef Casting, 13 -sbraQed-fby a deps-nfl# gef-on'apron, 2Q formed on the foreretoQbyboltsllS.' The intermediate,

ward edge of base 8 and to curedby bolts 19.

Wth this construction, it will be readily apparent that the forward end of the car is so constructed and reinforcedas to properly support the boom structure (not shown) and withstand any blows imparted thereto by the manipulation of the clipper' not shown), at the same time providing the highly desiralble beveled` corners, To further insure against breakage by the dipper,v the outer faces of castings9 and 13 are .formed withy pockets 21 having suitable buffer blocks 22 readily detachably secured therein by bolts 23, passed through., apertures inthe'y blocks and the walls of. the pockets.

As best shown iny Figures 2 and 3,' casting 13is provided with butasinglerow oi'I but ter block receiving pockets, whereas castings 9 are provided with two rowsfof but-I` fer block receiving pockets, asth'ed clipper cannot strike theupper` part ofthe'cast'ing 13i The buffer blocksniay be of any desired material and, as theybecomev Abroken or worn, canl bey renewedl by removing securing bolts 23 and Dlacingnew `blocks in 'thepockf ets. 4

From the foregoingl description taken in connection with the accompanying drawing, itwill be readily obvious that in this con struction thel advantagesfof the beveled cor,- ners areobtained andthe necessary strength provided by the combination of the forward ly extending side ca -stings, the webv reinforcements inthe inner Ij-'beanns and the transverse buffer casting` bridging the .inner I-beams under the main base platefront end.

lllhat is claimedis:

1. An end construction for an excavator car, comprising a boom supporting base plate, inner sills extending to the outer rend ot the base plate, shorterouter sills, anda transom structure binding the inner and outer sillsl together, saidtransom structure including separator casting lwhich forni sube stantially bevel corners for the car.

2. A front end construction for an eXcavafA tor car, comprising a booni supportinginain base, plate, ai pair of inner sills extending forward to the end oit the main base plate, a., pair ot shorter outer sills, and atransoin structure binding the innerand outer sills together, said transom structure.l including a pair ot separator castings which form bevel corneisfor thecar.

3, An vend construct-imiter, an eXcaviator.A car, includingsupporting sills, aboonrsupporting base plate inountedzfon; the; sills,` a; transom structure- YKbin-dingthe sillsiiitogether, said Vtransom Astructure including-yr a.. separator casting having l pockets, formedA ,therein and bufferblocksxisecured in` said 'poeketsV1 l 4. An end construction 1for.an,eXcavator car, including supporting sillsjaboon lsup,k porting b ase plater mounted "0nv thel s1 transom structure binding the sillsv together,- said transom structure including a separator casting having pockets formed therein, and renewable buffer blocks secured in said pockets.

5. An end construction for an excavator car, including a boom supporting base plate, -beams extending to the outer end of the base plate, and a bridge and buffer meinber extending across the outer ends of the I-beams, said member having pockets formed therein for buffer blocks; j

6. An end construction for an excavator car, including a boom supporting b-ase plate,

s I-beanis extending to the outer end of the base plate, a bridge and buffer casting extendingacross the outer ends of the I- beams, said casting having pockets formed therein, buffer blocks secured in the pockets, and web reinforcements for the I-beams.

7. A front end construction'for an excavator car, comprising a boom supporting main base plate, a pair of inner sills extending forward to the end of the base plate, a pair of shorter outer sills, a bridge and buffer casting connecting the forward ends of the inner sills, and a transom structure binding the adjacent inner and outersills together and including av pair of separator castings which form bevel corners for the car.

8. A front end construction for an excavator car, comprising a boom supporting main base plate, a pair of inner sills extending forward to the end of the base plate, a pair of'shorter outer sills, a bridge and buffer casting connecting the forward ends ofthe inner sills, a transom structure binding the adjacent inner and outer sills together and .including a pair of separator castings which form bevel corners for the car, and buffer blocks carried by the bridge and buffer casting and the separator castings.

9. A front end construction for an excavator car, comprising a boom supporting ber.

main base plate, a ypair of "inner I beam sills extending forward to the end of the base plate, a pair of shorter outer sills, a bridge and buffer casting binding thek inner sills together, a transom structure binding the adjacent inner and outer sills together land y including va pair of separator castings which form bevel corners for the car,`web reinforcing means for the inner sills, and buffer blocksV carried by the bridge and buffer casting and the separator castings.

10. An end construction for'an excavator car, including a base plate, avtransverse bridge member positioned with its upper edge adjacent the outer end of the base plate, and an apron carried by the base plate and projected overjthe bridge mem- 11. An end construction for an excavator car, including a base plate, a transversev bridge memberpositioned with its upper A edge adjacent the outer endy of the ,base plate, a depending apron carried by the outer end of the base plate and projected over the front face `of the bridge member, and means securing the apron to .the bridge member. l e

l2. An end construction for an excavator car, including a base plate, brace means terminating adjacent the outer end of the base plate, a bridgevcasting extending across the outer endsof the braceV beams with its upper edge adjacent the base plate outer end, an apron angularly projected from the base plate and extended over the front face `of the bridge casting, and securing means rididly connecting the apron and bridge castlng.

In testimony that we claim the foregoing we have hereunto set our hands at South f Milwaukee, inthe county of Milwaukee and State of Wisconsin.

svANTE lR. w. n. BAGER. WERNER LEHMAN. 

